7.2k views
5 votes
-5x + 7y = -3
-3x - y = 19

-5x + 7y = -3 -3x - y = 19-example-1

2 Answers

7 votes

Answer:

x=-5, y=-4

Explanation:

to solve this system of equations, first multiply the second equation by 7 to get -21x-7y=133. this allows for the y terms in both equations to cancel once you add the two equations together.

adding these together, the y term cancels and you are left with -26x=130. so dividing both sides by -26 will get x=-5. then plug this x value back into either original equation (i chose -3x-y=19) so solve for y.

-3(-5)-y=19 so -y=4 so y=4

so the answer to the system of equations is x=-5 and y=-4

User BigLex
by
8.0k points
4 votes
The answer is letter c
User Ben Visness
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories